Hand tool for driving corrugated fasteners



June 6, 196? R. F. SCHMIDT 3,3 23,56%

HAND TOOL FOR DRIVING CORRUGATED FASTENERS Filed Aug 5, 1.965

4% MIL M FEGJL INYENCIURJ ,mwmmmm BY w ymwws United States Patent 3,323,568 HAND TUGL FOR DRIVING CGRRUGATED FASTENERS Roy F. Schmidt, 12 Hamilton Ave., Berlin, NJ. 081309 Filed Aug. 3, 1965, Ser. No. 476,821 1 Claim. (Cl. 145-46) This invention relates generally to hand tools and particularly to a combination punch and countersink.

A principal object of the invention is to provide an improved hand tool of the type aforesaid for corrugated fasteners.

Another object is to provide such a tool used for punching the fastener into the work and simultaneously countersinking the area of the work into which the fastener is driven.

Another object is to provide such a tool which is sturdy in construction and therefore longlived.

Another object is to provide such a tool which is simple in design, economical to manufacture and convenient in use.

Other objects of the invention will become apparent when the following description is read with reference to the accompanying drawing, in which:

FIGURE 1 is a perspective view of a hand tool constructed in accordance with the invention, showing a fastener extending across a miter joint and the tool positioned for punching the fastener into the joint and countersinking the area into which the fastener is driven;

FIGURE 2 is an end View of the tool shown in FIGURE 1;

FIGURE 3 is similar to FIGURE 2, but shows the fastener fully punched into the wood and the surface of the wood countersunk; and

FIGURE 4 shows the depression made by the tool filled in with putty or the like flush with the surface of the work and concealing the head of the fastener.

The following description is directed to the specific form of the invention shown in the drawing and is not addressed to the scope of the invention, which may be practiced in a variety of forms.

The work, generally designated 10, includes wooden frame members 12 and 14 having a miter joint 16.

The fastener, generally designated 18, is a conventional corrugated fastener. The corrugations extend longitudi nally of the fastener. The upper edge of the fastener is plain, while the lower edge is provided with a series of teeth 22.

The tool constructed in accordance with the invention, generally designated 24, comprises a body 26 made from a single length of bar stock uniform in transverse section. The undersurface of the body 26 is provided with a longitundinally extending open channel 28 having a base wall 30 and opposite side walls 32. The longitudinally extending opposite side marginal areas of the undersurface of the body 26 are set back from the longitudinally extending surface areas 40 underlying the walls defining the channel "ice 23 to form the base walls 36 of a pair of open recesses 34 having side walls 38. The base wall 30, the coplanar surface areas 40 and the coplanar surface areas 36 are parallel, and the opposite side walls 32 of the channel 28 and the side walls 38 of the recesses 34 are parallel and normal to base wall 30 and surface areas 40 and 36. Ex tending upwardly from the body 26 is a handle 42 adapted to withstand blows from a hammer, designated 44.

In the use of the tool, the fastener is suitably positioned across the miter joint and then driven into the wood by hammer blows applied to the head of the fastener until the head of the fastener extends approximately 4; to A of an inch above the surface of the wood. The tool is then applied to the fastener, as in FIGURES 1 and 2. The fit of the head of the fastener into the channel 28 is a snug one and the opposite sides of the fastener respectively engage the opposite sides 32 of the channel 28. Now hammer blows are applied to the end of the handle 42 of the tool whereby to drive the head of the fastener below the surface of the wood and simultaneously depress the Wood on both sides of the fastener, as in FIGURE 3. The base wall 30 of the channel bears uniformly on the plain upper terminal edge of the fastener, in consequence of which the force of a hammer blow is uniformly distributed throughout the length of the fastener. Thus the teeth 22 at the lower end of the fastener penetrate, and the base surfaces 36 of the recesses 3 underlying the tool eventually engage, the work (FIGURE 3). The depth of the countersink is limited by the base surfaces 36. The tool is then pulled upwardly to detach it from the fastener, leaving the fastener in the work. The depressed area may then be filled with putty 46 or the like whereby to conceal the head of the fastener.

It will be noted that the tool is made of a single length of bar stock uniform in transverse section, in consequence of which it is exceedingly simple in design, easy and economical to manufacture and sturdy in use.

What is claimed is:

In a hand tool for corrugated fasteners, a body consisting of a single length of bar stock uniform in transverse section, said body having an open channel in the undersurface thereof and extending the full length of said body, said channel having opposite side walls disposed respectively in spaced parallel planes and being of a width to snugly receive the upper end of a fastener, and the longitudinally extending marginal undersurface areas of the tool body being set back from the lower terminal surfaces of the Walls defining the channel.

References Cited UNITED STATES PATENTS 3/1886 Van Dusen -46 7/1925 Lundeen 227-147 

